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For Release: Dec. 8, 2020

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Martin Muggee
Marketing Communications Manager


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  IRVINE, Calif. — Dec. 8, 2020

Sonnet Announces Full-Size, Three-Slot Thunderbolt™ 3 to PCIe® Card Expansion Systems

New Desktop and Rackmount Systems Feature Modular Design, Incorporate Improvements Important to Pro Audio Users

What’s New:
Sonnet Technologies today announced the launch of the Echo™ III Desktop and Echo III Rackmount, the newest members of the company’s award-winning family of Thunderbolt™ 3 to PCI Express® (PCIe®) card expansion systems. The Echo III Desktop is a full-size desktop chassis that enables the use of up to three high-performance PCIe cards with computers equipped with Thunderbolt ports, while the Echo III Rackmount offers the same support and features in a rack-mountable 2U enclosure. Replacing the popular Echo Express III-D and III-R (including HDX Editions), the new Echo systems have been upgraded with the addition of a mode switch that enables the use of multiple Avid® Pro Tools|HDX PCIe cards and new cooling fans for even quieter operation. Both of these units have been Avid-qualified.

“Following in the path of Sonnet’s previous generations of Thunderbolt to PCIe card expansion systems, the Echo III Desktop and Echo III Rackmount are the latest to receive the Avid qualified stamp of approval. Sonnet collaborated with Avid on these highly anticipated replacements for the Echo Express III-D and III-R Thunderbolt 3 HDX Edition systems to improve design elements throughout. The resulting products are simple to set up and remarkably quiet in operation. They are ideal for use with Avid Pro Tools | HDX systems, allowing up to 3-card configurations for massive mixing performance and up to 192 channels of simultaneous I/O, using multiple DigiLink I/O interfaces such as Pro Tools | HD I/O, Pro Tools | MTRX or Pro Tools | MTRX Studio.”
- Francois Quereuil, Director of Product Management, Pro Tools, Avid

What They Do:
Echo III Desktop and Rackmount expansion systems enable users to connect three PCIe cards to computers lacking PCIe card slots. The Echo III Module used in both systems features one x16 and two x8 PCIe 3.0 slots; accommodates up to full-height, full-length (up to 12.28 inches long) PCIe cards; and connects them to a computer’s Thunderbolt port via the included 0.7-meter Thunderbolt 3 (40Gbps) cable. The module integrates a universal 400W power supply and includes a 75W auxiliary power connector for non-GPU cards that require extra power. The Echo III Module provides two Thunderbolt 3 ports, with one for connection to the computer, while the second supports daisy-chaining of up to five additional Thunderbolt peripheral devices plus two 4K monitors (or one 5K display), or a single USB device. The system provides up to 15W of power to any connected peripheral or host.

Why They're Important:
In general, computers lack the unique ports and specific data processing capabilities needed for pro audio and video workflows, forcing users to add internal or external interfaces to support I/O, audio digital signal processing, and video capture and playback. While desktop workstations, like the Mac Pro®, can be outfitted with PCIe adapter cards to add what’s needed, the portable, mini desktop, and all-in-one computers (such as the MacBook Pro®, Mac mini®, and iMac®) often favored by pro users require the use of Thunderbolt-connected expansion. Sonnet’s Echo III Desktop and Echo III Rackmount expansion systems enable users to save space and money by mounting up to three PCIe cards in a transportable desktop or 2U rackmount enclosure, respectively, and connecting them to their computer through a single Thunderbolt 3 cable.

How They're Unique:
With the inclusion of Sonnet’s unique HDX mode switch, Pro Tools users can install up to three HDX PCIe cards into the Echo III Desktop or Echo III Rackmount without the additional parts or adapters previously needed to enable their use. Echo III expansion systems feature dual Noctua NF-R8 redux-1800 fans, known for their low-noise operation, making the Sonnet chassis more suitable for use in noise-sensitive environments. Sonnet designed Echo III expansion systems with flexibility in mind — not only are the systems available in two form factors, but Sonnet will also offer desktop and rackmount enclosures for purchase separately, enabling users to move one Echo III module (with PCIe cards installed) between enclosures. Additionally, the Echo III Rackmount has mounting space for another Echo III Module (also available separately) or for future expansion modules coming soon.

When You Can Get Them:
The Echo III Desktop (part number ECHO-3D-T3) and Echo III Rackmount (part number ECHO-3R-T3) will be available from Sonnet on December 11 at suggested retail prices of $799.99 and $899.99, respectively.

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About Sonnet Technologies
Sonnet Technologies Inc. is a leading provider of Thunderbolt™ 3 to PCIe® card expansion systems; external graphics (eGFX) solutions for pro users and gamers; pro media readers; docks and adapters; and network, storage, and other interface cards for pro users in the audio, video, and broadcast industries. Sonnet’s Thunderbolt expansion products enable the use of pro audio I/O and DSP cards, pro video capture and transcoding cards, GPU cards, network and storage interface cards, and other high-performance PCIe cards with Thunderbolt technology-enabled computers. For more than 30 years Sonnet has pioneered and brought to market innovative and award-winning products that enhance the performance and connectivity of Mac®, Windows®, and other industry-standard computers. More information is available at


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